18720275

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{4651}}^1$

素因数の和:4691

約数の個数: 24

約数和(自身を含む): 27688704

約数和(自身を除く): 8968429

約数列:

[1, 5, 7, 23, 25, 35, 115, 161, 175, 575, 805, 4025, 4651, 23255, 32557, 106973, 116275, 162785, 534865, 748811, 813925, 2674325, 3744055, 18720275]

約数ペア:

[(1, 18720275), (5, 3744055), (7, 2674325), (23, 813925), (25, 748811), (35, 534865), (115, 162785), (161, 116275), (175, 106973), (575, 32557), (805, 23255), (4025, 4651)]